胆红素锶的EXAFS和FT-IR研究  

EXAFS and FT-IR Studies of the Structure of Strontium Bilirubinate

作　　者：刘会洲 吴瑾光[1] R.D.Soloway 王加赋 徐光宪[1] 赵雅琴[3] 陆坤权[3] 

机构地区：[1]北京大学化学系 [2]美国Texas大学Galveston分校医学院 [3]中国科学院物理研究所

出　　处：《北京大学学报（自然科学版）》1990年第4期406-412,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金(NSFC)

摘　　要：以胆红素(H_2BR)为原料,合成组成为SrBR·2H_2O的胆红素锶,并进行了EXAFS研究,得知胆红素锶的第一配位层包含0和N两种原子,配位数为8,其Sr-O和Sr-N距离分别为2.60A和2.69A。比较H_2BR和SrBR·2H_2O的FT-IR光谱,根据-NH,-COOH和内酰胺等谱带变化,提供了胆红素中含氮和含氧基团与锶配位的证据,与EXAFS实验结果相互一致。In present investigation, strontium bilirubinate was synthesized. Its composition was determined as SrBR·2H2O by elemental analysis. From the data reduction and data analysis of EXAFS spectra of SrBR·2H2O and model compound, it follows that the first shell about Sr(Ⅱ) of title compound consists of two types of 2.60 A and 2.69 A respectively. The coordination number of Sr is 8, four O atoms and four N atoms. Comparing the FT-IR spectra of H2BR and SrBR·2H2O, two bands were changed in formation of SrBR·2H2O. From the changes of bands N-H of pyrrole and lactam and car-boxylates, it means that the N atoms of H2BR and two carboxylates are coordinated to Sr atom. The results of FT-IR spetra coincided with the conclusions deduced from EXAFS study.

关 键 词：胆红素 锶 EXAFS FT-IR 胆结石 

分 类 号：R657.420.2[医药卫生—外科学]